Artificial tooth.



C. E. SUMMY.

ARTIFICIAL TOOTH.

APPLICATION FILED MAR. 23. I918- ].,298,41 9. Patented Mar. 25,1919.

INVENTOR 'arks ESQ/2222125 WITNESSES v ATTORN EY UNITED STATES PATENTOFFICE.

CHARLES E. SUMMY, OF PRIMGHAR, IOWA.

' ARTIFICIAL TOOTH.

Specification of Letters Patent. Patented Mar, 25, 1919.

Application filed March 28, 1918. Serial No. 224,204.

dentistry and has for an object to provide new and improved artificialteeth of the type mounted on a plate wherein the teeth may beinterchanged or replaced without the necessity of revulcam'zing orotherwise afiecting the plate or the mounting of the remaining teeth,teeth to be replaced by mere attachment to the anchoring plate withoutthe necessity of altering the structure of the plate, or disturbing therelation of the remaining teeth. I

In addition to the foregoing my invention comprehends improvements inthe details of construction and arrangement of the correlative parts tobe hereinafter more fully described and particularly set forth in theappended claims.

In the accompanying drawings in which similar and corresponding partsare designated by the same characters of reference throughout theseveral views in which they appear Figure 1, is a view in side elevationof an anterior tooth mounted upon an anchoring plate of my invention.

Fig. 2, is a view of the tooth of the preceding figure in sectiontogether with the anchoring plate and the vulcanite plate in section toillustrate the correlation of the parts.

Fig. 3, is a View of an anterior tooth in front elevation including theplates.

Fig. 4, is a view in side elevation of a bicuspid and plate.

Fig. 5, is a view of a bicuspid and plate 1n section.

Fig. 6, is a view of the bicuspid and plate in front elevation.

Fig. 7, is a View in side elevation of a posterior tooth and plate.

Fig. 8, is a view of the tooth of the immediately preceding figure insection including the plate illustrating the manner 1n which the toothis mounted thereon.

Fig. 9, is a view of the posterior tooth in front elevation includingthe plate, and

Fig. 10, is a view in bottom plan of one of the anchoring plates.

With reference to Figs. 1, 2 and 3 of the drawings, 10 indicates aninterior tooth having a recess 11 formed in its under side. My inventionincludes an anchoring plate indicated at 12 which is curvedlongitudinally as shown and is provided upon its upper surface with arearwardly deflected stud 13 designed to enter the recess 11 of thetooth. The surface of the stud is preferably corrugated or formed withthreads so 'as to insure a firm anchorage of the stud in the cement usedto secure the tooth in place. The plate 12 is formed adjacent theforward end with a transversely extending aperture 1 1, and'its underside is formed with a lurality of sockets or depressions 15. hevulcanite plate indicated at 16 is formed on its upper surface adjacentthe periphery in a manner to permit the embedding of the anchoring plate12 therein in suitable relation to receive the teeth, whereby the teethmay be disposed'in regular order when secured to the plate. It will benoted that the material of the vulcanite plate may enter the aperture 14as wellv as the de ressions 15 to insure the firm anchoring of theanchoring plate to the vulcanite plate so as to permanently bind the twotogether. It is to be noted that the stud 13 is to be located adjacentand beyond the Vertical center of the tooth so as to be in a position toreceive the cement uniformly and to rigidly hold the tooth againstmovement.

It will be apparent that owing to this construction the tooth 10 whenbroken may be easily replaced by another without disturbing theanchoring plate 12 and hence without disturbing the order or arrangementof the remaining teeth or without requiring the revulcanization of thevulcanite plate.

With reference to Figs. 4, 5 and 6 of the drawings, 17 indicates abicuspid, the anchoring plate for which is indicated at 18. Thisanchoring plate is provided with a stud 19' upon its upper surface ofslightly broader dimensions in order to sustain the added strain placedthereupon and the forward end ofthe plate 18 is formed with a dependinglip 19 apertured transversely at 20. This plate is embedded in thevulcanite plate in the manner of the anchoring plate described above andhence the manner in which this be obvious. M 7

In Figs. 7, 8 and 9 of the drawings, a

posterior tooth has been indicated"at-21.'

5 ing plate; having an upstandingstud enter- The anchoring plate 22therefor is thicker and heavier than the platesprevioilslj def scribedand provided with a stout stud2 4 upon its upperserrate-to enter arelatively large recess in the undersideof the tooth.

The plate 22 is otherwise"eohstructedfln manner identical wit-h theplates previously described:

pensfe anaemia the replacem nt pi damaged: teeth 'vvillbenoininali Theanchoring plates may be ffoiined of platinum or-a cheaper frn'et'alsiic'h asa'luminuin, "or any The us s and advantages of i this 7 typePoi art to which this invention appertainis. H

ters Patent is p p "1; A tooth'havinlg a recess, and an anchoring saidrecess, the lower face of the plate being provided with depressions;combined with a vu-lcanite plate into which said anohoringplate isembedded. '2. The'conmbin'ation'" of a vulcanizing plate, an anchoringplate embedded therein -vits medium around said stud.

' in presence of two witnesses?" In testimony whereof Iaifii:

type of tooth is niounted should- 7 Having thn s described inventionwhat 25 I'claim as newan'd desireto"seeurebyLetp I lower face havingdepressions and "it's' 'bofdy" me im each, by ad ressingithe commissinef 6r rateiit sg

